catwalkonce.pngCatWalkOnce is the rule of this platforming puzzle game. You have to figure out how to only walk on all the blue squares once, thereby turning them red (and deadly). Some stages require you to plan your path carefully such that you arrive at a door exit, too.

The game later introduces 90- and 180-degree directional turns, switches for invisible blocks, and deadly spikes to make your path more difficult. The difficulty really ramps up midway!

Niliter Games/Charlie's CatWalkOnce has a bit of Japanese dialogue, but it doesn't affect the gameplay. I would suggest when there's more than one door to go with all the left doors first. You'll have to play the game at least twice to unlock every stage for "free play," so why not be systematic?